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May 09 2011

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VMware – CPU key indicators

Important CPU metrics to look at when troubleshooting CPU performance in VMware environments.

 

%Ready (%RDY)
•% time a vCPU was ready to be scheduled on a physical processor but couldn’t due to processor contention
•Investigation Threshold: 10% per vCPU
%Co-Stop (%CSTP)
•% time a vCPU in an SMP virtual machine is “stopped” from executing, so that another vCPU in the same virtual machine could be run to “catch-up” and make sure the skew between the two virtual processors doesn’t grow too large
•Investigation Threshold: 3%
%Max Limited (%MLMTD)
•% time the VM was ready to run but wasn’t scheduled because it would violate the CPU Limit set.
•Investigation Threshold: 0%
These values can be obtained using esxtop. See http://www.yellow-bricks.com/esxtop/ for an in-depth explanation.
§Ready (%RDY)
% time a vCPU was ready to be scheduled on a physical processor but couldn’t due to processor contention
Investigation Threshold: 10% per vCPU
§Co-Stop (%CSTP)
% time a vCPU in an SMP virtual machine is “stopped” from executing, so that another vCPU in the same virtual machine could be run to “catch-up” and make sure the skew between the two virtual processors doesn’t grow too large
Investigation Threshold: 3%
§Max Limited (%MLMTD)
% time the VM was ready to run but wasn’t scheduled because it would violate the CPU Limit set.
Investigation Threshold: 0%

Permanent link to this article: https://ituda.com/vmware-cpu-key-indicators/

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